One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,6,5)(3,4,8,7)(17,18,23,20)(19,24,21,25)(22,26,30,28)(27,31,29,32)(1,3,6,8)(2,7,5,4)(9,10)(11,16)(12,14)(13,15)(17,19,23,21)(18,24,20,25)(22,27,30,29)(26,31,28,32)(1,4)(2,3)(5,8)(6,7)(9,11,13,14)(10,12,15,16)(17,19,23,21)(18,25,20,24)(22,27,30,29)(26,32,28,31)(2,5)(3,8)(9,10)(11,12)(13,15)(14,16)(17,20,23,18)(19,24,21,25)(22,28,30,26)(27,31,29,32)(1,4)(2,3)(5,8)(6,7)(17,21,23,19)(18,24,20,25)(22,29,30,27)(26,31,28,32)(1,5,6,2)(3,4,8,7)(9,12)(10,14)(11,15)(13,16)(17,22,23,30)(18,26,20,28)(19,27,21,29)(24,31,25,32)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.